docs: def _create_ssh_keys(self):
          """
          Generate a pair of ssh keys for this prefix
  
          Returns:
              None
  
          Raises:
              RuntimeError: if it fails to create the keys
          """
          ret, _, _ = utils.run_command(
              [
                  'ssh-keygen',
                  '-t',
                  'rsa',
                  '-m',
                  'PEM',
                  '-N',
                  '',
                  '-f',
                  self.paths.ssh_id_rsa(),
              ]
          )
          if ret != 0:
              raise RuntimeError(
                  'Failed to crate ssh keys at %s',
                  self.paths.ssh_id_rsa(),
              )